>it was their network and they could put any restrictions on it
Would you say the same of Comcast? When it is the only ISP serving the apartment you just signed a lease on?
Because that is basically the position of an undergrad in university housing with respect to "their network." You could say they had a choice not to go to that school, but for a state school system?
On a network engineering level, something is deeply wrong if you can't separate internet access from access to sensitive resources. Or if you are treating a subnet which includes tens of thousands of students as "trusted."